SEABROOK — Aaron Desjardins, the Epping man accused of murdering his ex-wife, Amanda “Amy” Warf, was ordered held without bail at his arraignment Wednesday.

Desjardins, 36, did not speak during a hearing that lasted about five minutes in Seabrook Circuit Court, nor did he enter a plea. Shortly after 1:30 p.m. he was arraigned on a first-degree murder charge alleging he purposely caused the death of Warf when he severed a carotid artery by slitting her throat last Thursday.

Senior Assistant Attorney General Susan Morrell would not reveal what weapon Desjardins used, but she did say the wounds were horizontal and “deep into the tissue.”

The state's chief medical examiner ruled Warf's death a homicide last week.

When Morrell was asked outside the courthouse on Wednesday why the state believes Desjardins killed Warf, she said it was too early in the investigation to comment on that.

“As we always say, we can't give you any information about the ongoing investigation in which would include motive and any other circumstances surrounding this case,” she said.

Warf's body was found just after 7 a.m. on March 7, in an abandoned concrete plant in Exeter after firefighters responded to a fire there. Morrell said the state fire marshals determined the fire was intentionally set by using an accelerant, but did not reveal who started it.

Morrell said Desjardins has not been charged of setting the fire, but if he or someone else is, it is likely the charge will be a misdemeanor and not a felony, because the building is not a residence and is vacant.

No one else has been arrested in connection with Warf's murder, but Morrell said that it is “always a possibility.”

Desjardins is also to have no direct or indirect contact with his former mother-in-law, Nancy Warf, his wife, Sarah Desjardins, or his sister, Michelle Corson.

“Currently, we want to prevent any contact with anyone who may be a potential witness in this case while we continue to investigate,” Morrell said. “It is to protect the integrity of the investigation.”

Desjardins and Warf were married for nearly seven years before divorcing in February 2012. Desjardins told Foster's on Sunday that they were still working out their parenting plan over their 11-month-old son, William Edward Warf, at the time of her death.

Morrell said “family” is taking care of the baby at this time.

Desjardins appeared to emerge as an early suspect. Homicide investigators searched his home Sunday evening and again on Monday.

In the interview with Foster's on Sunday, Desjardins claimed he had nothing to do with his ex-wife's murder. He was then arrested on Tuesday near his home.

“We are very lucky that we have been able to bring some closure here for the family as quickly as we have and I think that is a credit to our investigators in this case,” Morrell said of how fast they were to bring the charge.

Court documents are sealed in the investigation to protect the case, according to Morrell.

“We are continuing to investigate the facts and circumstances surrounding (Warf's) death and that will be ongoing for months and probably years to come,” she said.

As Desjardins was escorted out of the courtroom on Wednesday, he was placed in the back of a law enforcement vehicle, remaining silent while surrounding media asked him if he missed his ex-wife or his son.

Desjardins is next scheduled to appear in court in Brentwood for a probable cause hearing on March 22 at 10 a.m.